Pressure chart

^{Curiosity about the wind}

^{Press play to see the evolution}

These charts show the surface pressure pattern using isobars (lines of equal pressure) and indicate areas of high (H) and low pressure (L)

The pressure evolution shows wind behavior and atmosphere in/stability, providing a preview on the weather for the next days.

Ventusky also shows some projected weather fronts on the map.
You can read more about this here

Weather Fronts

^source

^source ^{– Here high pressure is represented by (A, a) and low pressure by (B, b) because it’s a different language source, and the fronts for Europe and the North Atlantic.}